Merkel KR1 Helix in .308 Win with a 22-inch barrel. A modular take-down straight-pull bolt rifle with tool-free barrel exchange and a helix-cam operating system that differentiates it from all competitors. Type: Rifle Action: Straight-Pull Bolt-Action Caliber: .308 Winchester Capacity: 5 Year introduced: 2010, Germany Weight: 96 oz Overall length: 42" Status: Active Intended use: Hunting, All-Purpose